Improvement in machines for finishing wheels for watches



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"j JAMES L. -HATHAW-av, or NORFOLK, VIRGINIA,

Letters Patent No. 107,90, dated October 4, 1870.

`IMPRovrwl'lsnri"in MAcHlYNEs'l-OR'FINISHING wH ELs-FoR WATCHES..

lThe Schedule referred to in these Letters Patentand makingpart of the same To all 'whom @t m'ayconcern:

Beit known that I, JAMES. L. HATHAWAY, of Norfolk, in the county of Norfolk and ,State'of Virginia, have invented a new and improved Machine for Finishing Wheels; and I do hereby declare-that the following is a full, clear, and exact descrption'there ot, which will enable others skilled in-the art tcmakeY ai'idnse the same, reference being had. to :the ac` 1 companying drawing forming ,part oi'lthis snecication.

This inventionV relates toimprovements in machinery for dressing and 'finishing small gear and other `wheels for watches and the like,and consists in arotary cutter of' peculiar construction, anda wheelsupport, arranged as h ereinafter c lescribed, for turning` the faces or peripheries ofthe wheels; alsofor dressing ont and finishingthe teeth.

Figure 1 is' a sectional elevationof my improved Figure 2 ,isv a plan view of the same; i

.Fignre 3 is a plan view ofthe cutter; vand Figure 4 is a face view of one cffthe collars `used for holding and adjustingY the cutters. f

Similar letters of refereuceindicate correspomling parts... n

vis the beam ot' an ordinarywatchlnakcrs lathe.

an l l i B slide placed'thereon, betweenthe stocks C, for holding the centers DV lt is another slide, arranged in B in theordinary way, and to work -transver'selyto it.

F is a support for thc-vertical centers Gr H', pivoted to a stud I, projecting fronr one side oi E, near the outer end, and rising vertically from it, so as to hold the said centers by the'` arms K L, infront of a h cutter mounted between the centers '1).

the s upport'E around its pivot,v s Y y :PA's a wheel? upport niountedqon a stud, T, rising having an eccentricfshaped top-plate 1t," which maybe used for supporting wheels of different sizes, being turnedv nl j and adjusted `so that the periphery of the wheel toA be' acted on will project slightly beyond.Y the edge of.`

it infront of the center.

This wheel-support and `the stnd en which it turns Iv arehollow, and admit the `center G to rise up through them, the said center being held-by a set-screw, S, at

any point.`

The hollow stud also admits of the pivots oi' the wheel extending downward to thecenter Gr.

The saidstud does not rise quite as high as the top of'i the wheel-support,leavng a space in the latter for tlie-insertion of small collets, chucks, or col- .lars-c, as 'may be required for reception ofthefhubs ot'whcels and the like, said collets being removable for the substitution of those having dierentsized holes.

The upper center H is held in place by the split .screw-threaded' tube V and nut WV,

vThe dressing and finishing wheel is `composed of the thinrotary cutter, a pair of collars, one of which is shown l at b, `and an adjusting screw, el, the said w'heel being placed on a mandrel, e, tit-ted to work between the centersof a lathe.

The cutter is madeof a thin plate of`steel, from which a .considerable part is removed at f, and a eut, y; is made from the -space f. to the periphery, l

as shown, sothat a screw, cl, screwing 'through the -collar h, against` the part t near the cut g, may spring itfto one side into a'recess, k, made 1n the collar b.

forthe purpose oi' turning the wheel on which the cutter acts bythe act of cutting the periphery of the wheel.

It' it designed to dress., oli" the whole face of the'iwheel, the offset ofthe part tis not greater than the thickness of the cutter, so that each time .it comes `around to the wheel it will begin a new out by the side` of the last one; but for cutting cog-teeth or dressing out those already cut', the oli'- 'set should be made as great as the pitch of the teeth, so that it will reach as far to the sideof the notch last cutf asrequired- Vto enter .the next notch'; the wheel is then turnedthe distance of' one tooth bythe inclined part of the cutter; it then remains in; position till the plane part escapesfrom theA machine.

Any other suitable or Aequivalent means may be. employed for adj ust-ing the cutter.

2Having thus described my invention,

I. claim as new and desire to secure by Letters Pat' 1 substantially as specified.

.This offset in periphery 'of the cutter is lmade 8. The combination of the rotating support Q R arranged substantially as shown and described, for the and hollow stud, with supportK and set-screw S, subpurpose specified. stantially :is shown and described.

4. The combination, with the subject-matter of third claim, of the series of interchangeable c0llets,' Witnesses: substantially as specified. JNO. R. HATHAWAY,

5. The combination with the supporting-table, of the GEORGE WALKER. slide E, support F, feed-screw M, stud N, and nut O,

JAS. L. HATHAWAY. j 

